The corresponding relational adjective is interrogative.
Embedded questions are not strictly speaking sentences by which the speaker asks for information, but they are nevertheless usually regarded as a subtype of questions.
- content question, question-word question, wh-question
- echo question
- embedded question, indirect question
- leading question
- polar question, yes-no question
The term question (Lation quaestio) goes back to antiquity. Its exact origin cannot be determined because the term is also used outside linguistics.